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What is the “Execute Around” idiom?
What is this "Execute Around" idiom (or similar) I've been hearing about?
Why might I use it, and why might I not want to use it?
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How to check if an activity is the last one in the activity stack for an application?
...ks and their stack using ActivityManager.
So, to determine if an activity is the last one:
request android.permission.GET_TASKS permissions in the manifest.
Use the following code:
ActivityManager mngr = (ActivityManager) getSystemService( ACTIVITY_SERVICE );
List<ActivityManager.RunningTask...
sqlalchemy IS NOT NULL select
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column_obj != None will produce a IS NOT NULL constraint:
In a column context, produces the clause a != b. If the target is None, produces a IS NOT NULL.
or use isnot() (new in 0.7.9):
Implement the IS NOT operator.
Normally, IS NOT is generate...
What is Activity.finish() method doing exactly?
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When calling finish() on an activity, the method onDestroy() is executed. This method can do things like:
Dismiss any dialogs the activity was managing.
Close any cursors the activity was managing.
Close any open search dialog
Also, onD...
python: how to identify if a variable is an array or a scalar
...ave a function that takes the argument NBins . I want to make a call to this function with a scalar 50 or an array [0, 10, 20, 30] . How can I identify within the function, what the length of NBins is? or said differently, if it is a scalar or a vector?
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Is there a tool to convert JavaScript files to TypeScript [closed]
Now TypeScript came out, it is an exciting news for me, but how can I convert all the existing JavaScript files to TypeScript.
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Is there an alternative to bastard injection? (AKA poor man's injection via default constructor)
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As far as I understand, this question relates to how to expose a loosely coupled API with some appropriate defaults. In this case, you may have a good Local Default, in which case the dependency can be regarded as optional. One way to deal with option...
Why is the tag deprecated in HTML?
...s contents — it does not describe its contents.
One method of centering is to set the margin-left and margin-right properties of the element to auto, and then set the parent element’s text-align property to center. This guarantees that the element will be centered in all modern browsers.
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Maximum single-sell profit
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I love this problem. It's a classic interview question and depending on how you think about it, you'll end up getting better and better solutions. It's certainly possible to do this in better than O(n2) time, and I've listed three d...
Why do we need the “finally” clause in Python?
...we need finally in try...except...finally statements. In my opinion, this code block
14 Answers
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